feat: Use of rust function due to initialization of dtvcc_rust in mp4.c

Author: IshanGrover2004

src/lib_ccx/ccx_dtvcc.h

@@ -13,6 +13,7 @@ void dtvcc_free(dtvcc_ctx **);
 #ifndef DISABLE_RUST
 extern void *ccxr_dtvcc_init(struct ccx_decoder_dtvcc_settings *settings_dtvcc);
 extern void ccxr_dtvcc_free(void *dtvcc_rust);
+extern void ccxr_dtvcc_process_data(void *dtvcc_rust, const unsigned char *data);
 #endif
 
 #endif // CCEXTRACTOR_CCX_DTVCC_H

src/lib_ccx/mp4.c

@@ -417,8 +417,14 @@ static int process_clcp(struct lib_ccx_ctx *ctx, struct encoder_ctx *enc_ctx,
 					continue;
 				}
 				// WARN: otherwise cea-708 will not work
+
+#ifndef DISABLE_RUST
+				ccxr_dtvcc_set_encoder(dec_ctx->dtvcc_rust, enc_ctx);
+				ccxr_dtvcc_process_data(dec_ctx->dtvcc_rust, (unsigned char *)temp);
+#else
 				dec_ctx->dtvcc->encoder = (void *)enc_ctx;
 				dtvcc_process_data(dec_ctx->dtvcc, (unsigned char *)temp);
+#endif
 				cb_708++;
 			}
 			if (ctx->write_format == CCX_OF_MCC)

src/rust/src/lib.rs

@@ -133,6 +133,10 @@ extern "C" fn ccxr_dtvcc_set_encoder(dtvcc_rust: *mut Dtvcc, encoder: *mut encod
     unsafe { (*dtvcc_rust).encoder = encoder };
 }
 
+extern "C" fn ccxr_dtvcc_process_data(dtvcc_rust: *mut Dtvcc, data: &[u8]) {
+    unsafe { &mut (*dtvcc_rust) }.process_cc_data(data[0], data[1], data[2], data[3]);
+}
+
 /// Process cc_data
 ///
 /// # Safety